Relative efficacy of three oxanilate formulations namely ethyl 4'fluorooxanilate, ethyl
4'bromooxanilate and ethyl 2'nitrooxanilate in comparison to the check gametocide
sodium methyl arsenate was studied for selective induction of male sterility on the
rice variety Pusa 150 at two concentrations and three stages of.development. Ethyl
4'fluorooxanilate applied with 1500 ppm at stamen-pistil primordia stage or at stage
between polIen mother celI formation and meiosis proved most effective with highest
polIen and spikelet sterility, widest action spectrum and least phytotoxicity. Gametocides
of wide action spectrum ensure higher seed yield and genetic purity. Pilot study on
hybrid seed production revealed ethyl 4'fluorooxanilate applied as single spray at
stamen-pistil primordia stage to be superior to sodium methyl arsenate with higher
percentage seed set, test grain weight and seed yield.
Keywords: Rice, hybrid, chemical hybridizing agent (CHA), gametocides, male sterility, seed production.
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
A. JAUHAR ALI, C. DEVAKUMAR, F. U. ZAMAN AND E. A. SIDDIQ info_circle